42 Scientific and technological services and research and design services relating thereto, industrial analysis and industrial research services provided by persons, individually or collectively, in relation to the theoretical and practical aspects of complex fields of activities, such services are provided by members of professions such as chemists, physicists, engineers, computer scientists, etc., the services of engineers who undertake evaluations, estimates, research and reports in the scientific and technological scientific research services for medical purposes. investigations and assessments on trade issues, the services provided by members of professions such as doctors, veterinary surgeons, psychoanalysts, medical treatment services